rootfs/etc/lib/lsb/init-functions-2

# -*-Shell-script-*-
#
# functions This file contains functions to be used by most or all  # ×¢ÊÍ £º¸Ã½Å±¾¼¸ºõ±» /etc/init.d/ ϵÄËùÓнű¾Ëùµ÷Óã¬ÒòΪËü°üº¬ÁË´óÁ¿µÄ
#  shell scripts in the /etc/init.d directory.        # µÄ»ù´¡º¯Êý¡£Í¬Ê±Ò²±» /etc/rc.d/rc.sysinit £¬ÀýÈç success¡¢action¡¢failure µÈº¯Êý
#
 
TEXTDOMAIN=initscripts    # ÉèÖà TEXTDOMAIN ±äÁ¿
 
 
##########################################################################################################################################################
# Make sure umask is sane     # È·±£ root Óû§µÄ umask ÊÇÕýÈ·µÄ 022 £¨Ò²¾ÍÊÇ rwxr-xr-x£©
umask 022
 
# Set up a default search path.           # ÉèÖÃĬÈ쵀 PATH ±äÁ¿
PATH="/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin"  # ĬÈÏΪ /sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin
export PATH         # µ¼³öΪ»·¾³±äÁ¿
 
# Get a sane screen width    # ÉèÖÃÕýÈ·µÄÆÁÄ»¿í¶È
[ -z "${COLUMNS:-}" ] && COLUMNS=80     # Èç¹û COLUMNS ±äÁ¿µÄֵΪ¿Õ£¬ÔòÉèÖÃΪ 80 £¨ÁУ©
 
[ -z "${CONSOLETYPE:-}" ] && CONSOLETYPE="`/sbin/consoletype`"    # Èç¹û CONSOLETYPE Ϊ¿ÕÔòÉèÖà CONSOLETYPE Ϊ /sbin/consoletype ÃüÁî·µ»ØµÄÖµ
                                                                                                             # Ò»°ãÊÇ vt »òÕß pty ¡¢serial
##########################################################################################################################################################
if [ -f /etc/sysconfig/i18n -a -z "${NOLOCALE:-}" ] ; then      # Èç¹û´æÔÚ /etc/sysconfig/i18n ÇÒ NOLOCALE ±äÁ¿µÄֵΪ¿Õ£¬Ôò
      . /etc/sysconfig/i18n       # Ö´ÐÐ /etc/sysconfig/i18n Îļþ£¬È¡µÃ LANG ±äÁ¿µÄÖµ
      if [ "$CONSOLETYPE" != "pty" ]; then        # Èç¹ûµ±Ç° console ÀàÐͲ»ÊÇ pty£¨Ô¶³ÌµÇ¼£©£¬¶øÊÇ vt »òÕß serial £¬Ôò
          case "${LANG:-}" in                                                                                                    # ¸ù¾Ý LANG µÄÖµ×÷³öÑ¡Ôñ
              ja_JP*|ko_KR*|zh_CN*|zh_TW*|bn_*|bd_*|pa_*|hi_*|ta_*|gu_*)    # Èç¹û LANG ÊÇ ÈÕÎÄ¡¢ÖÐÎļòÌå¡¢ÖÐÎÄ·±Ìå¡¢º«Îĵȣ¬Ôò
                   export LC_MESSAGES=en_US                                                                                                # °Ñ LC_MESSAGES ÉèÖÃΪ en_US
                   export LANG                                                                                                                       # ͬʱµ¼³öΪ»·¾³±äÁ¿
                   ;;
              *)
                   export LANG                                                                                                                # Èç¹ûÊÇÆäËûÀàÐ͵ÄÓïÑÔ£¬ÔòÖ±½Óµ¼³ö LANG
               ;    ;
         esac
      else                                                                                                                    # Èç¹ûµ±Ç° consle ÊÇ pty                                                   
       [ -n "$LC_MESSAGES" ] && export LC_MESSAGES        # ÇÒÈç¹û LC_MESSAGES ²»Îª¿Õ£¬ÔòÖ±½Óµ¼³ö LC_MESSAGES 
       export LANG
  fi
fi
##########################################################################################################################################################
 
# ÏÂÃæÊÇÉèÖà success¡¢failure¡¢passed¡¢warning 4ÖÖÇé¿öϵÄ×ÖÌåÑÕÉ«µÄ
 
# Read in our configuration
if [ -z "${BOOTUP:-}" ]; then      # Ê×ÏÈÈç¹û BOOTUP ±äÁ¿Îª¿Õ£¬Ôò
  if [ -f /etc/sysconfig/init ]; then       # Èç¹û´æÔÚ /etc/sysconfig/init Îļþ£¬Ö´ÐÐ /etc/sysconfig/init Îļþ
      . /etc/sysconfig/init
  else                 # ·ñÔòÎÒÃǾÍÊÖ¹¤ÉèÖÃ
    # This all seem confusing? Look in /etc/sysconfig/init,
    # or in /usr/doc/initscripts-*/sysconfig.txt
    BOOTUP=color           # µÚÒ»ÉèÖà BOOTUP ±äÁ¿£¬Ä¬ÈϾÍÊÇ color 
    RES_COL=60             # µÚ¶þÉèÖÃÉèÖÃÔÚÆÁÄ»µÄµÚ¼¸ÁÐÊä³öºóÃæµÄ "[ xxx ]" £¬Ä¬ÈÏÊǵÚ60ÁÐ
    MOVE_TO_COL="echo -en //033[${RES_COL}G"      # MOVE_TO_COL ÊÇÓÃÓÚ´òÓ¡ "OK" »òÕß "FAILED" ,»òÕß "PASSED" ,»òÕß "WARNING" ֮ǰµÄ²¿·Ö£¬²»º¬ "[" 
    SETCOLOR_SUCCESS="echo -en //033[1;32m"       # SETCOLOR_SUCCESS ÉèÖúóÃæµÄ×ÖÌ嶼ΪÂÌÉ«
    SETCOLOR_FAILURE="echo -en //033[1;31m"       # SETCOLOR_FAILURE ÉèÖúóÃ潫ҪÊä³öµÄ×ÖÌ嶼ΪºìÉ«
    SETCOLOR_WARNING="echo -en //033[1;33m"       # SETCOLOR_WARNING ÉèÖúóÃ潫ҪÊä³öµÄ×ÖÌ嶼Ϊ¡Á¡Á¡Á
    SETCOLOR_NORMAL="echo -en //033[0;39m"        # SETCOLOR_NORMAL ÉèÖúóÃæÊä³öµÄ×ÖÌ嶼Ϊ°×É«£¨Ä¬ÈÏ£©
    LOGLEVEL=1
  fi
  if [ "$CONSOLETYPE" = "serial" ]; then    # Èç¹ûÊÇͨ¹ý´®¿ÚµÇ¼µÄ£¬ÔòÈ«²¿È¡Ïû²ÊÉ«Êä³ö
      BOOTUP=serial
      MOVE_TO_COL=
      SETCOLOR_SUCCESS=
      SETCOLOR_FAILURE=
      SETCOLOR_WARNING=
      SETCOLOR_NORMAL=
  fi
fi
 
 
##########################################################################################################################################################
if [ "${BOOTUP:-}" != "verbose" ]; then    # Èç¹û BOOTUP ±äÁ¿µÄÖµ²»Îª verbose £¬Ôò
   INITLOG_ARGS="-q"                       # °Ñ INITLOG_ARGS µÄÖµÉèÖÃΪ -q £¨°²¾²Ä£Ê½£©
else                                       # ·ñÔò
   INITLOG_ARGS=                           # °Ñ INITLOG_ARGS µÄÖµÇë¿Õ 
fi
##########################################################################################################################################################
# Check if $pid (could be plural) are running            # ÏÂÃ涨ÒåÒ»¸öº¯Êý checkpid £¨£©£¬Ä¿µÄÊǼì²é /proc ÏÂÊÇ·ñ´æÔÚÖ¸¶¨µÄĿ¼£¨ÀýÈç /proc/1/£©
checkpid() {         # Èç¹ûÓÐÈÎÒâÒ»¸ö´æÔÚ£¬Ôò·µ»Ø0£»
 local i
 
 for i in $* ; do
  [ -d "/proc/$i" ] && return 0
 done
 return 1                 # Èç¹û¸ø³öµÄ²ÎÊýÈ«²¿²»´æÔÚ¶ÔÓ¦µÄĿ¼£¬Ôò·µ»Ø1
}
 
##########################################################################################################################################################
# A function to start a program.     # ÏÂÃ涨Òå×îÖØÒªµÄÒ»¸öº¯Êý£¬daemon º¯Êý£¬ËüµÄ×÷ÓÃÊÇÆô¶¯Ä³Ïî·þÎñ¡£/etc/init.d/ ϵĽű¾µÄ start ²¿·Ö¶¼»áÓõ½Ëü
daemon() {
 # Test syntax.
 local gotbase= force=
 local base= user= nice= bg= pid=
 nicelevel=0
 while [ "$1" != "${1##[-+]}" ]; do       # daemon º¯Êý±¾Éí¿ÉÒÔÖ¸¶¨¶à¸öÑ¡ÏÀýÈç --check <value> £¬--check=<value> £¬
   case $1 in
     '')    echo $"$0: Usage: daemon [nicelevel] {program}"    # Ò²¿ÉÒÔÖ¸¶¨ nice Öµ
            return 1;;
     --check)
     base=$2
     gotbase="yes"
     shift 2
     ;;
     --check=?*)
         base=${1#--check=}
     gotbase="yes"
     shift
     ;;
     --user)               # Ò²¿ÉÒÔÖ¸¶¨ÒªÒÔʲôÓû§Éí·ÝÔËÐУ¨--user <usr> , --user=<usr>)
     user=$2
     shift 2
     ;;
     --user=?*)
            user=${1#--user=}
     shift
     ;;
     --force)
         force="force"        # --force ±íʾǿÖÆÔËÐÐ
     shift
     ;;
     [-+][0-9]*)
         nice="nice -n $1"      # Èç¹û daemon µÄµÚÒ»¸ö²ÎÊýÊÇÊý×Ö£¬ÔòÈÏΪÊÇ nice Öµ
            shift
     ;;
     *)     echo $"$0: Usage: daemon [nicelevel] {program}"
            return 1;;
   esac
 done
 
        # Save basename.      # basename ¾ÍÊÇ´Ó·þÎñÆ÷µÄ¶þ½øÖƳÌÐòµÄ full path ÖÐÈ¡³ö×îºóµÄ²¿·Ö
        [ -z "$gotbase" ] && base=${1##*/}                                        
 
        # See if it's already running. Look *only* at the pid file.    # ¼ì²é¸Ã·þÎñÊÇ·ñÒѾ­ÔÚÔËÐС£²»¹ý daemon º¯ÊýÖ»²é¿´ pid Îļþ¶øÒÑ
 if [ -f /var/run/${base}.pid ]; then              # Èç¹û /var/run Ï´æÔڸ÷þÎñµÄ pid Îļþ£¬Ôò
  local line p
  read line < /var/run/${base}.pid          # ´Ó¸Ã pid Îļþÿ´Î¶ÁÈ¡Ò»ÐУ¬Ë͸ø±äÁ¿ line ¡£×¢Òâ pid Îļþ¿ÉÄÜÓжàÐУ¬ÇÒ²»Ò»¶¨¶¼ÊÇÊý×Ö
  for p in $line ; do                       # ¶ÔÓÚ line ±äÁ¿µÄÿ¸ö word ½øÐмì²é
   [ -z "${p//[0-9]/}" -a -d "/proc/$p" ] && pid="$pid $p"      # Èç¹û p È«²¿ÊÇÊý×Ö£¬ÇÒ´æÔÚ /proc/$p/ Ŀ¼£¬ÔòÈÏΪ¸ÃÊý×ÖÊÇÒ»¸ö pid £¬°ÑËü¼ÓÈëµ½ pid ±äÁ¿
  done       # µ½×îºó pid ±äÁ¿µÄÖµ¿ÉÄÜÊÇÓжà¸öÓÉ¿Õ¸ñ·Ö¸ôµÄÊý×Ö×é³É
 fi
 
 [ -n "${pid:-}" -a -z "${force:-}" ] && return     # Èç¹û pid ±äÁ¿×îÖÕΪ¿Õ£¬Ôò force ±äÁ¿Îª¿Õ£¨²»Ç¿ÖÆÆô¶¯£©£¬Ôò·µ»Ø
 
 # make sure it doesn't core dump anywhere unless requested        # ÏÂÃæ¶Ô¸Ã·þÎñʹÓõÄ×ÊÔ´×÷һЩÉèÖÃ
 ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0} >/dev/null 2>&1          # ulimit ÊÇ¿ØÖÆÓɸà shell Æô¶¯µÄ½ø³ÌÄܹ»Ê¹ÓõÄ×ÊÔ´£¬-S ÊÇ soft control µÄÒâ˼£¬-c ÊÇÖ¸×î´óµÄ core   
                                                                 # dump Îļþ´óС£¬Èç¹û DEAMON_COREFILE_LIMIT Ϊ¿Õ£¬ÔòĬÈÏΪ 0
 
 # if they set NICELEVEL in /etc/sysconfig/foo, honor it         # Èç¹û´æÔÚ /etc/sysconfi/foo Îļþ£¬ÇÒÆäÖÐÓÐ NICELEVEL ±äÁ¿ÔòÓÃËü´úÌæ  daemon ºóÃæµÄÄǸö nice Öµ
 [ -n "$NICELEVEL" ] && nice="nice -n $NICELEVEL"                # ×¢Ò⣬ÕâÀïµÄ nice ¸³ÖµÊÇÓà nice -n <value> µÄ¸ñʽ£¬ÒòΪ nice ±¾Éí¿ÉÒÔÆô¶¯ÃüÁÓÃÕâ¸ö¸ñʽ½Ï·½±ã
 
 # Echo daemon                                                   # Èç¹û BOOTUP µÄֵΪ verbose £¬Ôò´òÓ¡Ò»¸ö·þÎñÃû
        [ "${BOOTUP:-}" = "verbose" -a -z "$LSB" ] && echo -n " $base"
 
 # And start it up.                                                                                        # ÏÂÃæÊÇ¿ªÊ¼Æô¶¯ËüÁË
 if [ -z "$user" ]; then                                                                                  # Èç¹û user ±äÁ¿Îª¿Õ£¬ÔòĬÈÏʹÓà root Æô¶¯Ëü
    $nice initlog $INITLOG_ARGS -c "$*"                                                                # Ö´ÐÐ nice -n <nice_value> initlog -q -c "$*" 
 else                                                                                                         # Èç¹ûÖ¸¶¨ÁËÓû§£¬Ôò
    $nice initlog $INITLOG_ARGS -c "runuser -s /bin/bash - $user -c /"$*/""                # Ö´ÐÐ nice -n <nice_value> initlog -q -c "runuser -s /bin/bash - <user> -c "$*"
 fi
 [ "$?" -eq 0 ] && success $"$base startup" || failure $"$base startup"                # Èç¹ûÉÏÃæµÄÃüÁî³É¹¦£¬ÔòÏÔʾһ¸öÂÌÉ«µÄ [ OK ] £¬·ñÔòÏÔʾ [ FAILURE ]
}
 
 
##########################################################################################################################################################
 
# A function to stop a program.                                # ÏÂÃ涨ÒåÁíÍâÒ»¸öºÜÖØÒªµÄº¯Êý killproc £¬/etc/init.d/ ÏÂÃæµÄ½Å±¾µÄ stop ²¿·Ö¶¼»áÓõ½Ëü
killproc() {
 RC=0                                                                    # RC ÊÇ×îÖÕ·µ»ØµÄÖµ£¬³õʼ»¯Îª 0
 # Test syntax.
 if [ "$#" -eq 0 ]; then                                            # killproc º¯ÊýµÄÓï·¨¸ñʽÊÇ killproc <service> [<signal>] £¬ÀýÈç killproc sm-client 9
  echo $"Usage: killproc {program} [signal]"              
  return 1
 fi
 
 notset=0                                                             # noset ÊÇÓÃÓÚ¼ì²éÓû§ÊÇ·ñÖ¸¶¨ÁË kill ҪʹÓõÄÐźÅ
 # check for second arg to be kill level                  
 if [ -n "$2" ]; then                                                # Èç¹û $2 ²»Îª¿Õ£¬Ôò±íʾÓû§ÓÐÉ趨Ðźţ¬Ôò
  killlevel=$2                                                            # °Ñ $2 µÄÖµ¸³Óè killlevel ±äÁ¿
 else                                                                    # ·ñÔò
  notset=1                                                                # notset ±äÁ¿µÄֵΪ1£¬Í¬Ê± killlevel Ϊ '-9' £¨KILL Ðźţ©
  killlevel="-9"
 fi
 
# ²¹³ä £º×¢Ò⣬²¢²»ÊÇ˵Óû§Ã»ÓÐÖ¸¶¨ÐźŵØֹͣijÏî·þÎñʱ£¬¾Í»áÁ¢¼´Óà kill -9 ÕâÑùµÄ·½Ê½Ç¿ÖÆɱËÀ£¬¶øÊÇÏÈÓà TERM Ðźţ¬È»ºóÔÙÓà KILL
 
        # Save basename.
        base=${1##*/}                                                # basename ¾ÍÊǵóö·þÎñµÄÃû³Æ
 
        # Find pid.
 pid=                                                                    # °Ñ pid ±äÁ¿µÄÖµÇå¿Õ¡£×¢Ò⣬²»ÊÇÖ¸ pid ±äÁ¿µÄÖµµÈÓÚÏÂÃæ½Å±¾µÄÖ´Ðнá¹û£¬Òª¿´Çå³þ
 if [ -f /var/run/${base}.pid ]; then                         # ÏÂÃæºÍÉÏÃæµÄ daemon º¯ÊýÒ»ÑùÕÒ³ö pid 
    local line p
    read line < /var/run/${base}.pid
    for p in $line ; do
       [ -z "${p//[0-9]/}" -a -d "/proc/$p" ] && pid="$pid $p"
    done
 fi
 if [ -z "$pid" ]; then                                                # ²»¹ýºÍ daemon ²»Í¬µÄÊÇ£¬Ò»µ© pid Ϊ¿Õ²»»áÖ±½Ó return ¶øÊdz¢ÊÔÓà pid ÃüÁîÔٴβéÕÒ
  pid=`pidof -o $$ -o $PPID -o %PPID -x $1 || /            # -o ÊÇÓÃÓÚºöÂÔij¸ö pid £¬-o $$ ÊǺöÂÔµ±Ç° shell µÄ pid¡¢-o $PPID ÊǺöÂÔ shell µÄ pid 
   pidof -o $$ -o $PPID -o %PPID -x $base`                   # -o %PPID ÊǺöÂÔ pidof ÃüÁîµÄ¸¸½ø³Ì£¬Òª²éѯµÄ½ø³ÌÊÇ $1 (fullpath) »òÕß $base 
 fi
 
 # Kill it.                                                            
  if [ -n "${pid:-}" ] ; then                                        # Èç¹û pid µÄÖµ×îÖÕ²»Îª¿Õ£¬Ôò
    [ "$BOOTUP" = "verbose" -a -z "$LSB" ] && echo -n "$base "    # ÇÒ BOOTUP µÄֵΪ verbose £¬ÇÒ LSB ±äÁ¿²»Îª¿Õ£¬Ôò´òÓ¡Ò»¸ö·þÎñÃû
    if [ "$notset" -eq "1" ] ; then                                        # Èç¹û notset ±äÁ¿²»Îª1£¬±íʾÓû§Ã»ÓÐÖ¸¶¨Ðźţ¬Ôò
         if checkpid $pid 2>&1; then                                        # µ÷Óà checkpid  $pid ¼ì²éÊÇ·ñÔÚ /proc/ Ï´æÔÚ½ø³ÌĿ¼£¬Èç¹ûÓÐ
              # TERM first, then KILL if not dead                            # Ïȳ¢ÊÔÓà TERM ÐÅÏ¢£¬²»ÐÐÔÙÓà KILL ÐźÅ
              kill -TERM $pid >/dev/null 2>&1                                # Ö´ÐÐ kill -TERM $pid 
              usleep 100000                                                          # usleep ºÍ sleep Ò»Ñù£¬²»¹ýµ¥Î»ÊÇ°ÙÍò·ÖÖ®1Ãë¡£ÕâÀïÐÝÃß1Ãë
              if checkpid $pid && sleep 1 &&                                # Èç¹û checkpid $pid »¹ÊDz鵽ÓÐ /proc/<pid>/ Ŀ¼´æÔÚ£¬Ôò±íʾ»¹Ã»ÓÐɱËÀ£¬¼ÌÐøµÈ´ý1Ãë
                 checkpid $pid && sleep 3 &&                                # Èç¹û1ÃëºóÓà checkpid ¼ì²é»¹ÊÇÓУ¬ÔòÔٵȴý3Ã룻
                 checkpid $pid ; then                                            # Èç¹û»¹ÊÇûÓÐɱËÀ£¬ÔòÓà KILL ÐźÅ
                        kill -KILL $pid >/dev/null 2>&1                            # Ö´ÐÐ kill -KILL ɱËÀËü
                        usleep 100000                                                    # µÈ´ý1ÃëÖÖ
              fi
    fi
    checkpid $pid                                                             # Ôٴμì²é pid Ŀ¼       
    RC=$?                                                                         # ²¢°Ñ½á¹û·µ»Ø¸ø RC £¬Õâ¾ÍËãÊÇ killproc µÄ×îºó״̬ÁË
    [ "$RC" -eq 0 ] && failure $"$base shutdown" || success $"$base shutdown"    # Èç¹û RC µÄֵΪ0£¬Ôò±íʾkill -9 ûÓÐɱËÀÁ˽ø³Ì£¬Ôòµ÷Óà failure º¯Êý£¬·ñÔòµ÷Óà success 
    RC=$((! $RC))
  
    # use specified level only                                            # ÉÏÃ涼ÊÇÔÚûÓÐÖ¸¶¨ÐźŵÄÇé¿öµÄ£¬ÏÂÃæÊÇÓû§Ö¸¶¨ÁËÐźŵġ£ÀýÈç restart£©»òÕß reload£©²¿·Ö
    else    # Õâ¸ö else ÊÇÕë¶Ô if [ "$notset" -eq "1" ]  µÄ
       if checkpid $pid; then                                             # Èç¹û¼ì²éµ½½ø³Ì´æÔÚ£¬Ôò
            kill $killlevel $pid >/dev/null 2>&1                            # Ö´ÐÐkillÃüÁµ«Ê¹ÓÃÖ¸¶¨µÄÐźŠ$killlevel 
            RC=$?                                                                     # ²¢°Ñ״ֵ̬·µ»Ø¸ø±äÁ¿ RC
            [ "$RC" -eq 0 ] && success $"$base $killlevel" || failure $"$base $killlevel"    # Èç¹û RC Ϊ0Ôò±íʾ³É¹¦£¬µ÷Óà success£»·ñÔòµ÷Óà failure º¯Êý
       fi
  fi
 else      # Õâ¸ö else ÊÇÕë¶Ô if [ -n "${pid:-}" ]  µÄ£¬Ò²¾ÍÊÇ˵ûÓÐ pid Îļþ£¬pidof ÃüÁîҲûÓÐÕÒµ½ pid £¬Ôò
     failure $"$base shutdown"                # µ÷Óà failure º¯Êý£¬±íʾֹͣ·þÎñʧ°Ü
     RC=1                                             # ͬʱ RC µÄֵΪ1
 fi
 
 # Remove pid file if any.                    # ¸ù¾Ý¾ßÌåÇé¿ö¿ÉÄÜÐèҪɾ³ý pid Îļþ
 if [ "$notset" = "1" ]; then                    # Èç¹û notset ²»Îª1 £¬Ò²¾ÍÊÇÓû§Ã»ÓÐÖ¸¶¨ÐźŵÄÇé¿ö
            rm -f /var/run/$base.pid            # ×Ô¶¯É¾³ý /var/run Ï嵀 pid Îļþ
 fi
 return $RC                                        # ²¢°Ñ RC ×÷Ϊ exit status ·µ»Ø
}
 
# ²¹³ä £º×ÔËùÒÔɾ³ý pid ÎļþÖ»Õë¶Ô notset Ϊ1 µÄÇé¿ö£¬ÊÇÒòΪ -HUP Ðźţ¨ÖضÁÅäÖã©£¬²¢²»É±ËÀ½ø³Ì£¬ËùÒÔ²»ÄÜɾ³ýËüµÄ pid Îļþ
 
# ÀýÈçÏÂÃæ £º
 
[root@mail init.d]# ps -ef |grep xinetd
root      2635     1  0 12:25 ?        00:00:00 xinetd -stayalive -pidfile /var/run/xinetd.pid
[root@mail init.d]# ./xinetd reload
Reloading configuration:                                   [  OK  ]
[root@mail init.d]# ps -ef |grep xinetd
root      2635     1  0 12:25 ?        00:00:00 xinetd -stayalive -pidfile /var/run/xinetd.pid
root      3927  3412  0 16:43 pts/0    00:00:00 grep xinetd
[root@mail init.d]#
 
¿ÉÒÔ¿´µ½ pid ÔÚ reload ºó²¢Ã»Óбä
 
##########################################################################################################################################################
# A function to find the pid of a program. Looks *only* at the pidfile        # ÏÂÃæµÄ pidfileofproc º¯ÊýºÍ checkpid ÀàËÆ£¬µ«²»Ö´ÐÐ pidof ÃüÁֻ²éѯ pid Îļþ
pidfileofproc() {
 local base=${1##*/}
 
 # Test syntax.
 if [ "$#" = 0 ] ; then
  echo $"Usage: pidfileofproc {program}"
  return 1
 fi
 
 # First try "/var/run/*.pid" files
 if [ -f /var/run/$base.pid ] ; then
         local line p pid=
    read line < /var/run/$base.pid
    for p in $line ; do
         [ -z "${p//[0-9]/}" -a -d /proc/$p ] && pid="$pid $p"
    done
         if [ -n "$pid" ]; then
                 echo $pid
                 return 0
         fi
 fi
}
##########################################################################################################################################################
# A function to find the pid of a program.                        # ÏÂÃæµÄ pidofproc º¯ÊýºÍÉÏÃæµÄ pidfileofproc º¯ÊýÀàËÆ£¬µ«¶àÁËÒ»²½ pidof ÃüÁî
pidofproc() {
 base=${1##*/}
 
 # Test syntax.
 if [ "$#" = 0 ]; then
  echo $"Usage: pidofproc {program}"
  return 1
 fi
 
 # First try "/var/run/*.pid" files
 if [ -f /var/run/$base.pid ]; then
         local line p pid=
  read line < /var/run/$base.pid
  for p in $line ; do
         [ -z "${p//[0-9]/}" -a -d /proc/$p ] && pid="$pid $p"
  done
         if [ -n "$pid" ]; then
                 echo $pid
                 return 0
         fi
 fi
 pidof -o $$ -o $PPID -o %PPID -x $1 || /
  pidof -o $$ -o $PPID -o %PPID -x $base
}
##########################################################################################################################################################
status() {                                                                  # ×¢ÊÍ £ºÏÂÃæµÄ status º¯ÊýÊÇÅжϷþÎñµÄ״̬£¬×ܹ²ÓÐ4ÖÖ
 local base=${1##*/}
 local pid
 
 # Test syntax.
 if [ "$#" = 0 ] ; then
  echo $"Usage: status {program}"
  return 1
 fi
 
 # First try "pidof"                                                        # ͬÑùÊDzéÕÒ pid ÏÈ¡£Ö±½ÓʹÓà pidof ÃüÁî
 pid=`pidof -o $$ -o $PPID -o %PPID -x $1 || /                
      pidof -o $$ -o $PPID -o %PPID -x ${base}`
 if [ -n "$pid" ]; then                                                    # Èç¹û pid ±äÁ¿µÄÖµ²»Îª¿Õ£¬Ôò±íʾÕÒµ½½ø³Ì£¬
         echo $"${base} (pid $pid) is running..."                 # Ôò´òÓ¡ "xxx (pid nnn) is running " ,
         return 0                                                             # ²¢·µ»Ø 0
 fi
 
 # Next try "/var/run/*.pid" files                                    # Èç¹û pidof ÃüÁîûÓÐÕÒµ½£¬Ôò³¢ÊÔ´Ó pid ÎļþÕÒ
 if [ -f /var/run/${base}.pid ] ; then
         read pid < /var/run/${base}.pid
         if [ -n "$pid" ]; then                                                # Èç¹û pidof ÃüÁîÕÒ²»µ½£¬µ«´Ó pid ÎļþÕÒµ½ÁË pid £¬Ôò
                 echo $"${base} dead but pid file exists"                # ´òÓ¡ "xxx dead but pid file exists"£¬
                 return 1                                                             # ²¢·µ»Ø 1
         fi
 fi
 # See if /var/lock/subsys/${base} exists                            # Èç¹û pidof ÃüÁîºÍ pid Îļþ¶¼Ã»ÓÐÕÒµ½ pid £¬Ôò
 if [ -f /var/lock/subsys/${base} ]; then                              # Èç¹ûÔÚ /var/lock/subsys Ï´æÔÚ¶ÔÓ¦µÄÎļþ£¬Ôò
  echo $"${base} dead but subsys locked"                                # ´òÓ¡ ¡°xxxx dead but subsys locked¡±£¬
  return 2                                                                            # ²¢·µ»Ø 2
 fi
 echo $"${base} is stopped"                                                # Èç¹û pidof ÃüÁî¡¢pidf Îļþ¶¼Ã»ÓÐÕÒµ½pid £¬ÇÒûÓбðËø£¬Ôò´òÓ¡ ¡°xxx is stopped¡±
 return 3                                                                           # ²¢·µ»Ø3
}
##########################################################################################################################################################
 
# ×¢ÊÍ £ºÏÂÃæµÄ echo_xxx º¯Êý¾ÍÊÇÕæÕýÔÚÆÁÄ»ÉÏ´òÓ¡ [ ok ] ¡¢[ PASSED ]¡¢[ FAILURE ]¡¢[ WARNING ] µÄ²¿·ÖÁË
 
echo_success() {                                                                    # ÏÂÃæÊÇ echo_success ²¿·Ö
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL                            # Ê×ÏÈÊÇ´òÓ¡ ¡°[¡± ֮ǰµÄ¿Õ¸ñ
  echo -n "[  "                                                                         # È»ºó´òÓ¡ "[" 
  [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS                    # ÉèÖÃ×ÖÌåΪºìÉ«
  echo -n $"OK"                                                                       # ´òÓ¡ OK
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL                     # ·µ»Ø×ÖÌåΪ°×É«
  echo -n "  ]"                                                                         # ´òÓ¡ "]"    
  echo -ne "/r"                                                                        # »»ÐС£
  return 0                                                                               # ·µ»Ø 0£¬ÆäËûÒ»ÂÉ·µ»Ø 1
 
 
echo_failure() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  echo -n $"FAILED"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  echo -ne "/r"
  return 1
}
 
echo_passed() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
  echo -n $"PASSED"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  echo -ne "/r"
  return 1
}
 
echo_warning() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
  echo -n $"WARNING"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  echo -ne "/r"
  return 1
}
##########################################################################################################################################################
# Inform the graphical boot of our current state
update_boot_stage() {
  if [ "$GRAPHICAL" = "yes" -a -x /usr/bin/rhgb-client ]; then
    /usr/bin/rhgb-client --update="$1"
  fi
  return 0
}
##########################################################################################################################################################
# Log that something succeeded                                                
success() {                                                                                                # success º¯Êý³ýÁË´òÓ¡ [ xxx ] Ö®Í⣬»¹»áʹÓà initlog ¼Ç¼ÐÅÏ¢
  if [ -z "${IN_INITLOG:-}" ]; then
     initlog $INITLOG_ARGS -n $0 -s "$1" -e 1                                                   # -n ÊÇ --name µÄÒâ˼£¬-s ÊÇ --string £¬-e ÊÇ --event £¬1 ±íʾÍêÈ«³É¹¦
  else
     # silly hack to avoid EPIPE killing rc.sysinit
     trap "" SIGPIPE
     echo "$INITLOG_ARGS -n $0 -s /"$1/" -e 1" >&21
     trap - SIGPIPE
  fi
  [ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_success
  return 0
}
 
# Log that something failed
failure() {
  rc=$?
  if [ -z "${IN_INITLOG:-}" ]; then
     initlog $INITLOG_ARGS -n $0 -s "$1" -e 2                                                    # failure µÄ»° --event ÊÇ 2 ÊÇʧ°Ü
  else
     trap "" SIGPIPE
     echo "$INITLOG_ARGS -n $0 -s /"$1/" -e 2" >&21
     trap - SIGPIPE
  fi
  [ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_failure
  [ -x /usr/bin/rhgb-client ] && /usr/bin/rhgb-client --details=yes
  return $rc
}
 
# Log that something passed, but may have had errors. Useful for fsck
passed() {
  rc=$?
  if [ -z "${IN_INITLOG:-}" ]; then
     initlog $INITLOG_ARGS -n $0 -s "$1" -e 1                                                 # passed µÄ»° --event »¹ÊÇ1
  else
     trap "" SIGPIPE
     echo "$INITLOG_ARGS -n $0 -s /"$1/" -e 1" >&21
     trap - SIGPIPE
  fi
  [ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_passed
  return $rc
} 
 
# Log a warning
warning() {
  rc=$?
  if [ -z "${IN_INITLOG:-}" ]; then
     initlog $INITLOG_ARGS -n $0 -s "$1" -e 1                                                # warning µÄ»° --event Ò²ÊÇ 1
  else
     trap "" SIGPIPE
     echo "$INITLOG_ARGS -n $0 -s /"$1/" -e 1" >&21
     trap - SIGPIPE
  fi
  [ "$BOOTUP" != "verbose" -a -z "$LSB" ] && echo_warning
  return $rc
} 
##########################################################################################################################################################
# Run some action. Log its output.                                                        # action º¯ÊýÊÇÁíÍâÒ»¸ö×îÖØÒªµÄº¯Êý£¬ËüµÄ×÷ÓÃÊÇ´òӡij¸öÌáʾÐÅÏ¢²¢Ö´Ðиø¶¨ÃüÁî
tion() {
  STRING=$1
  echo -n "$STRING "
  if [ "${RHGB_STARTED}" != "" -a -w /etc/rhgb/temp/rhgb-console ]; then
      echo -n "$STRING " > /etc/rhgb/temp/rhgb-console
  fi
  shift
  initlog $INITLOG_ARGS -c "$*" && success $"$STRING" || failure $"$STRING"
  rc=$?
  echo
  if [ "${RHGB_STARTED}" != "" -a -w /etc/rhgb/temp/rhgb-console ]; then
      if [ "$rc" = "0" ]; then
       echo_success > /etc/rhgb/temp/rhgb-console
      else
        echo_failed > /etc/rhgb/temp/rhgb-console
 [ -x /usr/bin/rhgb-client ] && /usr/bin/rhgb-client --details=yes
      fi
      echo
  fi
  return $rc
}
##########################################################################################################################################################
# returns OK if $1 contains $2                        # strstr º¯ÊýÊÇÅÐ¶Ï $1 ×Ö·û´®ÊÇ·ñº¬ÓÐ $2 ×Ö·û´®£¬ÊÇÔò·µ»Ø0£¬·ñÔò·µ»Ø1
() {
  [ "${1#*$2*}" = "$1" ] && return 1
  return 0
}
##########################################################################################################################################################
# Confirm whether we really want to run this service                                       # confirm º¯ÊýÊÇÓÃÓÚ½»»¥Ê½µÄÆô¶¯·þÎñ
nfirm() {
  [ -x /usr/bin/rhgb-client ] && /usr/bin/rhgb-client --details=yes
  while : ; do 
    echo -n $"Start service $1 (Y)es/(N)o/(C)ontinue? [Y] "                                   # »á´òÓ¡Ò»¸öÌáʾÐÅÏ¢
    read answer
    if strstr $"yY" "$answer" || [ "$answer" = "" ] ; then                                          # Èç¹û answer ±äÁ¿ÊÇ y »òÕß Y Ôò
        return 0                                                                                                                # ·µ»Ø 0£¨µ«Î´ÕæÕýÆô¶¯£©
    elif strstr $"cC" "$answer" ; then                                                                    # Èç¹û answer ÊÇ c »òÕß C £¬Ôò
        rm -f /var/run/confirm                                                                                          # ɾ³ý /var/run/confirm Îļþ                           
        [ -x /usr/bin/rhgb-client ] && /usr/bin/rhgb-client --details=no
        return 2                                                                                                                # ·µ»Ø2
   elif strstr $"nN" "$answer" ; then                                                                      # Èç¹û answer ÊÇ n »òÕß N£¬Ôò
  return 1                                                                                                                       # Ö±½Ó·µ»Ø1
     fi
  done
}